[RESOLVED] Error 50003 Vista Only on Minimize

[Cbyte]

Hi, I have a strange unexpected error coming up with my app only on Vista! I have tracked down the bug, when my main form is minimized a MSN Messenger style popup appears (frmReminder) to give the user a reminder message, the process giving off the error is below, the specific line is (Me.Left = Screen.Width - Me.Width).

Public Function Iniciar(Texto As String, Index As Integer)
    If frmMain.ManualClick = False Then
        Unload Me
    Else
        
     
        Dim WindowRect As RECT
        SystemParametersInfo SPI_GETWORKAREA, 0, WindowRect, 0
        
        taskbar = ((Screen.Height / Screen.TwipsPerPixelX) - WindowRect.PAbj) * Screen.TwipsPerPixelX
        
       
        Me.Left = Screen.Width - Me.Width '<---- Line giving off the error!  <----
        Me.Top = Screen.Height '- Me.Height - taskbar
        resto = Screen.Height - Me.Height - taskbar
     
        a = Me.Height
        lblCaption.Caption = Texto
        
   
        
        Me.Show
        Timer1.Enabled = True
       
        
        SetTopMost
        SetTranci
        Me.Top = Screen.Height - taskbar
        tmrSlideIn.Enabled = True
        Me.Left = Screen.Width - Me.Width
        Me.Height = 0
    End If
End Function

Any ideas? This one has me stumped...